diff options
author | Anand Jain <anand.jain@oracle.com> | 2014-10-31 12:11:19 +0800 |
---|---|---|
committer | David Sterba <dsterba@suse.cz> | 2014-11-03 19:17:08 +0100 |
commit | 53cb7fbe8da8253ea3ac1ecc6a71c7ffd1d63f76 (patch) | |
tree | c1f1e342646090fad60d3e2bfa4db09716cf6125 | |
parent | dcf11c371cbcdca78f297fe042095912634a8323 (diff) |
btrfs-progs: introduce btrfs_register_all_device()
This function is to register all devices found after scanning
the system. Before we had this functionality with in the
btrfs_scan_lblkid(), however scanning and registering are two
different distinct operation its better keep them separate.
Also we want to optimize btrfs_scan_lblkid and avoid multiple
system scans unless needed. As of now device scan uses this function.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
-rw-r--r-- | utils.c | 27 | ||||
-rw-r--r-- | utils.h | 1 |
2 files changed, 28 insertions, 0 deletions
@@ -1266,6 +1266,33 @@ int btrfs_register_one_device(const char *fname) return ret; } +/* + * Register all devices in the fs_uuid list created in the user + * space. Ensure btrfs_scan_lblkid() is called before this func. + */ +int btrfs_register_all_devices(void) +{ + int err; + struct btrfs_fs_devices *fs_devices; + struct btrfs_device *device; + struct list_head *all_uuids; + + all_uuids = btrfs_scanned_uuids(); + + list_for_each_entry(fs_devices, all_uuids, list) { + list_for_each_entry(device, &fs_devices->devices, dev_list) { + if (strlen(device->name) != 0) { + err = btrfs_register_one_device(device->name); + if (err < 0) + return err; + if (err > 0) + return -err; + } + } + } + return 0; +} + int btrfs_device_already_in_root(struct btrfs_root *root, int fd, int super_offset) { @@ -82,6 +82,7 @@ int btrfs_add_to_fsid(struct btrfs_trans_handle *trans, u32 sectorsize); int btrfs_scan_for_fsid(int run_ioctls); int btrfs_register_one_device(const char *fname); +int btrfs_register_all_devices(void); char *canonicalize_dm_name(const char *ptname); char *canonicalize_path(const char *path); int check_mounted(const char *devicename); |